16 yo daughter stuck in her room for 3 years, won't go to school, won't socialize, demoralizes the whole family. Help

Hello everyone,I'm writing this after 3.5 years of extremely hard time with my 16 yo daughter.It's a long post, but your input would be so extremely appreciated, I'm really desperate and I'm not sure what should I do next.Some background:I have 3 kids (F 16, F 21, M 24)I live with my husband, daughter and son (2nd daughter lives w/ her boyfriend)Our household had been through rough years and it seems to only get worseWe tried: school consulting, shrinks, psychiatrists medicine, alternative medicine, rationalizing, being patient, yelling & being firm, getting a dogIt all started roughly 3.5 years ago.My daughter finished elementary school and was in summer break before going to high school. During that break, she hadn't gotten out much, basically slept, watched TV and ate junk food all day & night. We weren't alarmed, seemed like this is how kids are these days.The first year of high school started fine, and got gradually bitter. She skipped some classes (we got notified only months later), was rude to her teachers and was extremely cynical to everyone.A few months passed by and she started refusing waking up for school, Yelling, cursing, kicking for hours (literally 2-3 hours, every day) and we haven't managed to figure out why.Once a week turned to twice and trice, she just wouldn't go, And naïvely, thinking it's just a rough patch, we'd just give up and let her 'win' - promising she'll do better next year.The next summer break, she started mentioning she wants to die, that she wants eternal rest, she hasn't left the house, she would lock herself in her room watch TV, sleep, repeat. She wouldn't say hello to guests or family visiting and was yelling & cursing whenever anyone tried to talk to her or enter her room. After a straight month of hellish nights that we tried to talk this over, we got professional help.Our first stop was the school's consultant - there she said she hates going to school, she wants to die and that she hates her father (without apparent reason).Her life aspirations at that point (we think it's TV influenced) were "getting married to a rich guy and moving to his luxury Villa".Next stop were the shrinks & physiatrists, where she would repeat what she'd said, and made up stories about her father hitting & abusing her (which is plain wrong, he works most of the day and hasn't done any harm).Talking with her trying to figure out what's wrong, trying to reason with her frustration hasn't led anywhere.At this point she wouldn't go to school at all, she would say she hates everyone, she hadn't gone out except for her shrink appointments.After a while without any improvement, with sleepless nights full of worries and stress, I took her to a then-recommended medium... Thinking it would somehow help (I was hopeless at that point).This only made things worse and we stopped it after a couple of sessions when my daughter started having fears about the supernatural.Next summer break, she hasn't left the house yet again, refuses to see anyone, locks herself in the room.The following school year she refused to go and basically locked herself in her room for a year.The doctors prescribed anti depressants, Which caused her to sleep 16 hours a day and eating excessively.She gained 50 pounds and lost her self esteem, always saying she hates how she looks and that she can't leave the house.After three months of prescribed medicine she started getting aggressive outbursts and we've stopped the treatment.Next summer break up to this year we tried more shrinks, psychiatrists, alternative treatments, what not.School got her an 'incentive' to go to school by giving her a permit to leave at any hour.This helped a bit, she goes couple of times a week, but she wouldn't stay for more than 2 hours.Our current status is that she can't be approached, at all.She yells at everyone, she locks herself in her room and wants to be alone.She sleeps most of the day and eats at night.She talks only to me only if she needs something and goes straight in her room again.The last few years were a living hell. I don't know what's next really, I love her so much but this whole thing messes us up.I fear she'll try hurting herself at some point but I can't even talk to her without her screaming and kicking all over.Have you had any such experience ?Any advice would be appreciated.TL;DRThe past 3.5 years my daughter secludes herself, won't let anyone near her, hates everyone and everything, barely goes to school, she's become greedy, needy and unresponsive to anything we try. Not sure what to do next. via /r/Parenting http://ift.tt/2eCroUb